DTU Orbit RSS Feedhttp://orbit.dtu.dk/en/organisations/department-of-chemical-and-biochemical-engineering(4cd0d0f9-8115-4f9a-882c-cbd883caf6e7)/publications.html
RSS FeedThu, 21 Sep 2017 09:59:53 GMT2017-09-21T09:59:53ZStructural Characterization and Enzymatic Modification of Soybean Polysaccharideshttp://orbit.dtu.dk/en/publications/structural-characterization-and-enzymatic-modification-of-soybean-polysaccharides(2d167915-3288-45a4-a134-ec7eaeb66dad).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_bookanthology rendering_short rendering_bookanthology_short"><h2 class="title"><a rel="BookAnthology" href="http://orbit.dtu.dk/en/publications/structural-characterization-and-enzymatic-modification-of-soybean-polysaccharides(2d167915-3288-45a4-a134-ec7eaeb66dad).html" class="link"><span>Structural Characterization and Enzymatic Modification of Soybean Polysaccharides</span></a></h2><a rel="Person" href="http://orbit.dtu.dk/en/persons/brian-pierce(13a69724-565d-4057-836b-7f7f246744d5).html" class="link person"><span>Pierce, B.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/anne-s-meyer(1e9f4759-72d8-4d52-94ec-ce192ffca184).html" class="link person"><span>Meyer, A. S.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/joern-dalgaard-mikkelsen(2f591fc8-201a-4f5f-995d-fcdf0e095244).html" class="link person"><span>Mikkelsen, J. D.</span></a> &amp; Wichmann, J. <span class="date">2017</span> Kgs. Lyngby: <a rel="Publisher" href="http://orbit.dtu.dk/en/publishers/technical-university-of-denmark-dtu(f7c040ab-194a-4da4-b458-670da24b2a08).html" class="link"><span>Technical University of Denmark (DTU)</span></a>. <span class="numberofpages">156 p.</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research<span class="type_parent_sep"> › </span></span><span class="type_classification">Ph.D. thesis – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_bookanthology rendering_detailsportal rendering_bookanthology_detailsportal"><div class="abstract"><div class="textblock">The work in this thesis explores the structure of soybean polysaccharides, and examines approaches for the chemical and enzymatic degradation and solu-bilization of this material. <br />Soybean polysaccharides are produced in large quantities globally as a by-product of various soy production processes. The work presented in this text focuses on the insoluble cell wall polysaccharides produced during the manu-facture of soy protein isolate. Soybean polysaccharides are water insoluble and feature an approximate carbohydrate composition (by weight) of 35% ga-lactose, 20% glucose, 20% arabinose, 10% galacturonic acid, 8% xylose, 3% rhamnose, and 3% fucose. Currently, the majority of this material is disposed of as waste, increasing production costs. Opportunities exist for the develop-ment of novel functional ingredients from this abundant and underutilized ma-terial; however, efforts in this area are currently limited by the material’s insol-ubility. A central hypothesis of this work was that by obtaining a more complete understanding of the structure of this material, chemical and enzymatic ap-proaches could be developed to modify the polysaccharides, creating soluble polysaccharide fractions that could provide improved functionality in industrial applications. <br />To address this hypothesis, structural information was obtained through HPAEC compositional analysis and GC-MS linkage analysis. This work was conducted on the whole soybean polysaccharide fraction, instead of only chemically extracted portions of this material like those analyzed in previous studies. Using this linkage data, the polysaccharide classes in soybean were quantified for the first time, with the results (by weight) identifying the primary constituents as: type I arabinogalactan (27.8%), cellulose (23.5%), (glucu-rono)arabinoxylan (14.4%), arabinan (8.1%), rhamnogalacturonan I/II (6.2%), xyloglucan (2.7%), type II arabinogalactan (2.0%), and homogalacturonan (1.6%). Using this compositional data, a novel chemical solubilization process was developed utilizing hydrogen peroxide at elevated temperatures. This treatment resulted in the release of more than 70% of the original insoluble material as high molar mass, water-soluble polysaccharides. This solubilized fraction is significantly enriched in the non-cellulosic polysaccharides of soy-bean such as arabinogalactan, homogalacturonan, rhamnogalacturonan, arabinan, xyloglucan, and (glucurono)arabinoxylan. These results demon-strate that it is possible to solubilize significant portions of the soybean poly-saccharide using a one-step chemical treatment, which opens new possibili-ties for the expanded utilization of this material going forward. <br />The results from this work also highlight the recalcitrance of soybean cellulose and the significant role that this polysaccharide class plays in the overall in-solubility of the material. In an effort to address this, lytic polysaccharide monooxygenases (LPMOs) were evaluated for their ability to oxidatively de-grade soybean cellulose. The initial investigations utilized TrCel61A, an AA9 LPMO from Trichoderma reesei. This enzyme showed no oxidative activity on native soybean polysaccharides; however, significant oxidative degradation was observed on NaOH pretreated soybean polysaccharides. The oxidation products were evaluated using HPAEC and MS, with the results showing oxi-dation at both the C1 and C4 positions of cellulose. In addition, a synergistic effect between TrCel61A and a GH5 endo-β-1,4-glucanase was discovered, boosting the glucose release from NaOH pretreated soybean polysaccha-rides. <br />Building upon these observations, twenty-three additional LPMOs from seven fungal sources were evaluated (using TrCel61A as a benchmark), with none showing oxidative activity on native soybean polysaccharides. However, NaOH pretreatment of the raw material was shown to improve the enzymatic accessibility of the soybean cellulose through the removal of non-cellulosic polysaccharides. Following this pretreatment, seven LPMOs (including TrCel61A) showed activity on the pretreated soybean polysaccharides. These seven enzymes were subsequently evaluated for their ability to increase the glucose release from this material through hydrolytic boosting of endo-β-1,4-glucanase and beta-glucosidase activities. Significant boosting effects were observed for TrCel61A and one of the newly evaluated LPMOs (Aspte6), re-sulting in the release of over 36% substrate glucose when compared to only 20% in the absence of the LPMO. Evaluation of the oxidation products from these LPMO treatments with HPAEC and MS showed similar C4 oxidation patterns for all soybean polysaccharide-active LPMOs. In addition, the vast majority of soybean polysaccharide-active LPMOs were also found to have oxidative activity on microcrystalline cellulose. These results demonstrate the ability of enzymatic treatments to solubilize and modify soybean polysaccha-rides. They also suggest new opportunities to improve upon the enzymatic digestion of this substrate in the future. <br />Overall, the research conducted in this project has demonstrated the utility of structure-based modification approaches and suggests that the insolubility of soybean polysaccharides is primarily conferred by the cellulosic components. In addition, the results obtained suggest several new opportunities for direct chemical or enzymatic solubilization and degradation of insoluble soybean polysaccharides, paving the way for the improved utilization of this material in the future. </div></div><div class="phddissertation"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr></tbody></table><table class="properties"><tbody><tr><th>Place of Publication</th><td>Kgs. Lyngby</td></tr><tr><th>Publisher</th><td><a rel="Publisher" href="http://orbit.dtu.dk/en/publishers/technical-university-of-denmark-dtu(f7c040ab-194a-4da4-b458-670da24b2a08).html" class="link"><span>Technical University of Denmark (DTU)</span></a></td></tr><tr><th>Number of pages</th><td>156</td></tr><tr class="status"><th>State</th><td><span class="prefix">Published - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/structural-characterization-and-enzymatic-modification-of-soybean-polysaccharides(2d167915-3288-45a4-a134-ec7eaeb66dad).html2017-01-01T00:00:00ZDesign of Continuous Crystallizers for Production of Active Pharmaceutical Ingredientshttp://orbit.dtu.dk/en/publications/design-of-continuous-crystallizers-for-production-of-active-pharmaceutical-ingredients(f8ff9d04-654f-4e4d-91d2-02b343e64b6d).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_bookanthology rendering_short rendering_bookanthology_short"><h2 class="title"><a rel="BookAnthology" href="http://orbit.dtu.dk/en/publications/design-of-continuous-crystallizers-for-production-of-active-pharmaceutical-ingredients(f8ff9d04-654f-4e4d-91d2-02b343e64b6d).html" class="link"><span>Design of Continuous Crystallizers for Production of Active Pharmaceutical Ingredients</span></a></h2><a rel="Person" href="http://orbit.dtu.dk/en/persons/gerard-capellades-mendez(d8e162bf-2b18-4310-aec9-9bb02e2073cd).html" class="link person"><span>Capellades Mendez, G.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/soeren-kiil(080ff861-7fa8-4b37-a0a7-ee3a7cacb037).html" class="link person"><span>Kiil, S.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/kim-damjohansen(ca095f0d-81ca-4127-b341-7d3578a38976).html" class="link person"><span>Dam-Johansen, K.</span></a>, Mealy, M. J. &amp; Christensen, T. V. <span class="date">2017</span> Kgs. Lyngby: <a rel="Publisher" href="http://orbit.dtu.dk/en/publishers/technical-university-of-denmark-dtu(f7c040ab-194a-4da4-b458-670da24b2a08).html" class="link"><span>Technical University of Denmark (DTU)</span></a>. <span class="numberofpages">140 p.</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research<span class="type_parent_sep"> › </span></span><span class="type_classification">Ph.D. thesis – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_bookanthology rendering_detailsportal rendering_bookanthology_detailsportal"><div class="abstract"><div class="textblock">The production of Active Pharmaceutical Ingredients (APIs) is conducted primarily in batch processes. This manufacturing approach is reinforced by a patent-driven business model and the need to minimize the process development times for newly patented drugs. However, the regulatory and business environments are now changing. The increasing costs of drug development, combined with the strict regulations and the competition from generic manufacturers, have pushed pharmaceutical companies to seek cheaper and more sustainable production methods. <br />Transition from batch to Continuous Pharmaceutical Manufacturing (CPM) could lead to significant reductions in the production costs and an improved consistency of the product quality. As a result, development of such processes has received a significant interest in the past decade. To be able to compete in a patent-driven industry with relatively small annual production rates, CPM should be conducted in versatile units that offer short process development times and can be used for production of different compounds. <br />This PhD project deals with the development of novel crystallizer configurations and process design methods oriented to the crystallization of APIs with strict requirements for the control of crystal size and shape. The project includes the development of methods for the early assessment of crystal quality and the evaluation of techniques for improved control of crystallization kinetics in continuous systems. <br />In the first block of the PhD, a two-stage continuous Mixed Suspension Mixed Product Removal (MSMPR) crystallization setup was designed for the production of an API presenting elongated crystals. A step by step characterization was applied based on image analysis of the crystallization magma, from which the effects of process conditions on crystal size and shape were evaluated. Crystal breakage was found to be highly selective for a single crystal plane, leading to a significant broadening of the crystal shape distribution. This behavior was consistent with the observations in full-scale batch production, where the crystallization product is subject to significant mechanical stress in downstream processing. The attainable regions for the MSMPR cascade were obtained through a population balance model that is based on the real crystal dimensions obtained from image analysis. Finally, the crystallizer was optimized for a crystal dimension that is consistent through a moderate degree of crystal breakage during downstream processing. <br />The second block of the PhD involves a fundamental study of the effect of gas dispersion on crystal nucleation kinetics. It is frequently stated in the literature that the presence of an inert gas in a crystallizer can have an impact on crystallization kinetics, either via an improved mass transfer in the crystallizing suspension or by promoting heterogeneous nucleation. These statements are supported by a variety of studies in batch mode. However, the mechanisms are not yet fully understood. In this thesis, the effect of injecting a saturated gas on batch crystallization kinetics has been evaluated from experimental induction times. Combining induction time statistics with a detection method based on sample turbidity, the average time for crystal formation is separated from a detection delay that is a function of the rates of secondary nucleation and crystal growth. Results show a consistent 5-fold reduction in the detection delay for two model systems, and an effect on primary nucleation that is sensitive to the gas injection rate and the studied solute. These results indicate that the induction time reductions frequently reported in the literature could actually be a consequence of a faster crystallization rate after the first nuclei is formed. The mechanism behind these observations is presumably related to a significant improvement in the mixing pattern and intensity. <br />A novel continuous crystallizer design based on self-induced gas dispersion is presented and evaluated in the last block of the PhD. The objective was to evaluate if gas dispersion could be used to generate smaller crystals in an MSMPR crystallizer, as well as to further develop the understanding of the effect of a moving gas on secondary nucleation and crystal growth. The effect of gas dispersion on crystallization yield and crystal size distribution has been evaluated for a configuration that would be expected in an implemented process, and for operating conditions that are already optimized for the generation of small crystals. Results show that, in contrast with the observations in batch crystallizers, the effect of gas dispersion in a well-mixed MSMPR crystallizer is very limited. Further studies on the effect of impeller speed revealed that crystallization kinetics are not sensitive to variations in the mixing intensity for conditions that meet the requirements for homogeneous three-phase mixing. Results from this study further support the hypothesis that a moving gas phase is an alternative to promote different mixing conditions and demonstrate the limited applicability of this technique in a continuous MSMPR crystallizer. </div></div><div class="phddissertation"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr></tbody></table><table class="properties"><tbody><tr><th>Place of Publication</th><td>Kgs. Lyngby</td></tr><tr><th>Publisher</th><td><a rel="Publisher" href="http://orbit.dtu.dk/en/publishers/technical-university-of-denmark-dtu(f7c040ab-194a-4da4-b458-670da24b2a08).html" class="link"><span>Technical University of Denmark (DTU)</span></a></td></tr><tr><th>Number of pages</th><td>140</td></tr><tr class="status"><th>State</th><td><span class="prefix">Published - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/design-of-continuous-crystallizers-for-production-of-active-pharmaceutical-ingredients(f8ff9d04-654f-4e4d-91d2-02b343e64b6d).html2017-01-01T00:00:00ZCalculation of simultaneous chemical and phase equilibrium by the methodof Lagrange multipliershttp://orbit.dtu.dk/en/publications/calculation-of-simultaneous-chemical-and-phase-equilibrium-by-the-methodof-lagrange-multipliers(acfa5381-d48c-4e83-8362-40a613bbc781).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_contributiontojournal rendering_short rendering_contributiontojournal_short"><h2 class="title"><a rel="ContributionToJournal" href="http://orbit.dtu.dk/en/publications/calculation-of-simultaneous-chemical-and-phase-equilibrium-by-the-methodof-lagrange-multipliers(acfa5381-d48c-4e83-8362-40a613bbc781).html" class="link"><span>Calculation of simultaneous chemical and phase equilibrium by the methodof Lagrange multipliers</span></a></h2>Tsanas, C., <a rel="Person" href="http://orbit.dtu.dk/en/persons/erling-halfdan-stenby(08d1917e-6211-4ea5-8ac3-7959d122b86a).html" class="link person"><span>Stenby, E. H.</span></a> &amp; <a rel="Person" href="http://orbit.dtu.dk/en/persons/wei-yan(23ab3789-6a8a-465d-9f5f-bb8c94fddb4d).html" class="link person"><span>Yan, W.</span></a> <span class="date">2017</span> <span class="journal">In : <a rel="Journal" href="http://orbit.dtu.dk/en/journals/chemical-engineering-science(41b6b42c-c88d-430a-9461-5ec3aa5943f2).html" class="link"><span>Chemical Engineering Science.</span></a></span> <span class="volume">174</span>, <span class="pages">p. 112-126</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research - peer-review<span class="type_parent_sep"> › </span></span><span class="type_classification">Journal article – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_contributiontojournal rendering_detailsportal rendering_contributiontojournal_detailsportal"><div class="abstract"><div class="textblock">The purpose of this work is to develop a general, reliable and efficient algorithm, which is able to deal with multiple reactions in multiphase systems. We selected the method of Lagrange multipliers to minimize the Gibbs energy of the system, under material balance constraints. Lagrange multipliers and phase amounts are the independent variables, whose initialization is performed by solving a subset of the working equations. This initialization is the unconstrained minimization of a convex function and it is bound to converge. The whole solution procedure employs a nested loop with Newton iteration in the inner loop and non-ideality updated in the outer loop, thus giving an overall linear convergence rate. Stability analysis is used to introduce additional phases sequentially so as to obtain the final multiphase solution. The procedure was successfully tested on vapor-liquid equilibrium (VLE) and vapor-liquid-liquid equilibrium (VLLE) of reaction systems.</div></div><div class="article"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr><tr><th>Journal</th><td><a rel="Journal" href="http://orbit.dtu.dk/en/journals/chemical-engineering-science(41b6b42c-c88d-430a-9461-5ec3aa5943f2).html" class="link"><span>Chemical Engineering Science</span></a></td></tr><tr><th>Volume</th><td>174</td></tr><tr><th>Pages (from-to)</th><td>112-126</td></tr><tr><th>ISSN</th><td>0009-2509</td></tr><tr class="digital_object_identifiers"><th>DOIs</th><td><ul class="relations digital_object_identifiers"><li><a onclick="window.open(this.href); return false;" href="http://dx.doi.org/10.1016/j.ces.2017.08.033" class="link"><span>http://dx.doi.org/10.1016/j.ces.2017.08.033</span></a> </li></ul></td></tr><tr class="status"><th>State</th><td><span class="prefix">Published - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/calculation-of-simultaneous-chemical-and-phase-equilibrium-by-the-methodof-lagrange-multipliers(acfa5381-d48c-4e83-8362-40a613bbc781).html2017-01-01T00:00:00ZSimple preparation of thiol-ene particles in glycerol and surface functionalization by thiol-ene chemistry (TEC) and surface chain transfer free radical polymerization (SCT-FRP)http://orbit.dtu.dk/en/publications/simple-preparation-of-thiolene-particles-in-glycerol-and-surface-functionalization-by-thiolene-chemistry-tec-and-surface-chain-transfer-free-radical-polymerization-sctfrp(8ab3be53-b3dc-405a-81ca-5ac01db2ba33).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_contributiontojournal rendering_short rendering_contributiontojournal_short"><h2 class="title"><a rel="ContributionToJournal" href="http://orbit.dtu.dk/en/publications/simple-preparation-of-thiolene-particles-in-glycerol-and-surface-functionalization-by-thiolene-chemistry-tec-and-surface-chain-transfer-free-radical-polymerization-sctfrp(8ab3be53-b3dc-405a-81ca-5ac01db2ba33).html" class="link"><span>Simple preparation of thiol-ene particles in glycerol and surface functionalization by thiol-ene chemistry (TEC) and surface chain transfer free radical polymerization (SCT-FRP)</span></a></h2><a rel="Person" href="http://orbit.dtu.dk/en/persons/christian-hoffmann(8ffeded5-596a-493c-a736-9fcb47a78306).html" class="link person"><span>Hoffmann, C.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/valeria-chiaula(625aa13a-b878-4686-a61f-2fefe76b8ce7).html" class="link person"><span>Chiaula, V.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/manuel-pinelo(fa807a73-0c0c-4ac4-b835-5fb24fc2cdbc).html" class="link person"><span>Pinelo, M.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/john-woodley(dbb6f37d-325d-49d2-855d-aa887e9ecdd5).html" class="link person"><span>Woodley, J.</span></a> &amp; <a rel="Person" href="http://orbit.dtu.dk/en/persons/anders-egede-daugaard(7e16382e-9624-4bb9-94f2-19f5aee1fa75).html" class="link person"><span>Daugaard, A. E.</span></a> <span class="date">2017</span> <span class="journal">In : <a rel="Journal" href="http://orbit.dtu.dk/en/journals/macromolecular-rapid-communications(32b047f8-21bd-43fc-9168-1896054d2086).html" class="link"><span>Macromolecular Rapid Communications.</span></a></span> <span class="numberofpages">28 p.</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research - peer-review<span class="type_parent_sep"> › </span></span><span class="type_classification">Journal article – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_contributiontojournal rendering_detailsportal rendering_contributiontojournal_detailsportal"><div class="abstract"><div class="textblock">Thiol-ene (TE) based polymer particles have traditionally been prepared via emulsion polymerization in water (using surfactants, stabilizers and co-solvents). Here, we present a green and simple alternative with excellent control over particle size, while avoiding the addition of stabilizers. Glycerol is applied as a dispersing medium for the preparation of offstoichiometric TE (OSTE) microparticles, where sizes in the range of 40 to 400 µm are obtained solely by changing the mixing speed of the emulsions prior to cross-linking. Control over surface chemistry is achieved by surface functionalization of excess thiol groups via photochemical thiol-ene chemistry (TEC) resulting in a functional monolayer. In addition, surface chain transfer free radical polymerization (SCT-FRP) was used for the first time to introduce a thicker polymer layer on the particle surface. The application potential of the system is demonstrated by using functional particles as a support for immobilized enzymes in a continuous plug-flow reactor. </div></div><div class="article"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr><tr><th>Journal</th><td><a rel="Journal" href="http://orbit.dtu.dk/en/journals/macromolecular-rapid-communications(32b047f8-21bd-43fc-9168-1896054d2086).html" class="link"><span>Macromolecular Rapid Communications</span></a></td></tr><tr><th>Number of pages</th><td>28</td></tr><tr><th>ISSN</th><td>1022-1336</td></tr><tr class="status"><th>State</th><td><span class="prefix">Accepted/In press - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/simple-preparation-of-thiolene-particles-in-glycerol-and-surface-functionalization-by-thiolene-chemistry-tec-and-surface-chain-transfer-free-radical-polymerization-sctfrp(8ab3be53-b3dc-405a-81ca-5ac01db2ba33).html2017-01-01T00:00:00ZHigh-performance removal of acids and furans from wheat straw pretreatment liquid by diananofiltrationhttp://orbit.dtu.dk/en/publications/highperformance-removal-of-acids-and-furans-from-wheat-straw-pretreatment-liquid-by-diananofiltration(981e19fa-f61a-4ab8-a56a-5ad4bf003e75).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_contributiontojournal rendering_short rendering_contributiontojournal_short"><h2 class="title"><a rel="ContributionToJournal" href="http://orbit.dtu.dk/en/publications/highperformance-removal-of-acids-and-furans-from-wheat-straw-pretreatment-liquid-by-diananofiltration(981e19fa-f61a-4ab8-a56a-5ad4bf003e75).html" class="link"><span>High-performance removal of acids and furans from wheat straw pretreatment liquid by diananofiltration</span></a></h2><a rel="Person" href="http://orbit.dtu.dk/en/persons/mohd-shafiq-bin-mohd-sueb(9cb21517-fed8-40b5-aeee-110e4d7d9b4e).html" class="link person"><span>Sueb, M. S. M.</span></a>, Zdarta, J., Jesionowski, T., <a rel="Person" href="http://orbit.dtu.dk/en/persons/gunnar-eigil-jonsson(3cad998b-6169-4b60-8976-ed4af90ee63c).html" class="link person"><span>Jonsson, G.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/anne-s-meyer(1e9f4759-72d8-4d52-94ec-ce192ffca184).html" class="link person"><span>Meyer, A. S.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/henning-joergensen(a6715277-7655-41c9-a510-0897807d0d63).html" class="link person"><span>Jørgensen, H.</span></a> &amp; <a rel="Person" href="http://orbit.dtu.dk/en/persons/manuel-pinelo(fa807a73-0c0c-4ac4-b835-5fb24fc2cdbc).html" class="link person"><span>Pinelo, M.</span></a> <span class="date">2017</span> <span class="journal">In : <a rel="Journal" href="http://orbit.dtu.dk/en/journals/separation-science-and-technology(2fc1e638-75da-4dd3-8ae3-ec18fb0ce824).html" class="link"><span>Separation Science and Technology (Philadelphia).</span></a></span> <span class="volume">52</span>, <span class="journalnumber">11</span>, <span class="pages">p. 1901-1912</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research - peer-review<span class="type_parent_sep"> › </span></span><span class="type_classification">Journal article – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_contributiontojournal rendering_detailsportal rendering_contributiontojournal_detailsportal"><div class="abstract"><div class="textblock"><p>Two model solutions and a real stream from the hydrothermal pretreatment of wheat straw were subjected to nanofiltration, and permeate flux, retention and resistance to fouling were evaluated. Three commercial NF membranes were tested, and a pressure of 4 bars (range: 1–20 bars) and a temperature of 20ºC (range: 20–50ºC) were found to provide the best results in terms of retention. A subsequent nanodiafiltration consisting of five cycles enabled one to recover 90% of the monosaccharides (purity &gt;99%). This result showed that diananofiltration could be a promising strategy for the recovery of high-purity streams of monosaccharides from pretreatment liquids.</p></div></div><div class="article"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr><tr><th>Journal</th><td><a rel="Journal" href="http://orbit.dtu.dk/en/journals/separation-science-and-technology(2fc1e638-75da-4dd3-8ae3-ec18fb0ce824).html" class="link"><span>Separation Science and Technology (Philadelphia)</span></a></td></tr><tr><th>Volume</th><td>52</td></tr><tr><th>Issue number</th><td>11</td></tr><tr><th>Pages (from-to)</th><td>1901-1912</td></tr><tr><th>ISSN</th><td>0149-6395</td></tr><tr class="digital_object_identifiers"><th>DOIs</th><td><ul class="relations digital_object_identifiers"><li><a onclick="window.open(this.href); return false;" href="http://dx.doi.org/10.1080/01496395.2017.1302951" class="link"><span>http://dx.doi.org/10.1080/01496395.2017.1302951</span></a> </li></ul></td></tr><tr class="status"><th>State</th><td><span class="prefix">Published - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/highperformance-removal-of-acids-and-furans-from-wheat-straw-pretreatment-liquid-by-diananofiltration(981e19fa-f61a-4ab8-a56a-5ad4bf003e75).html2017-01-01T00:00:00ZEstimation of Physical Properties of Amino Acids by Group-Contribution Methodhttp://orbit.dtu.dk/en/publications/estimation-of-physical-properties-of-amino-acids-by-groupcontribution-method(670336a2-3a6e-47ba-b65c-663b31f7f83e).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_contributiontojournal rendering_short rendering_contributiontojournal_short"><h2 class="title"><a rel="ContributionToJournal" href="http://orbit.dtu.dk/en/publications/estimation-of-physical-properties-of-amino-acids-by-groupcontribution-method(670336a2-3a6e-47ba-b65c-663b31f7f83e).html" class="link"><span>Estimation of Physical Properties of Amino Acids by Group-Contribution Method</span></a></h2><a rel="Person" href="http://orbit.dtu.dk/en/persons/spardha-virendra-jhamb(96f08230-839c-45f5-9ca0-5a7bcfdcd96c).html" class="link person"><span>Jhamb, S. V.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/xiaodong-liang(723584e2-cb7e-488c-a430-f85e705739b3).html" class="link person"><span>Liang, X.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/rafiqul-gani(bdf5e329-bb7b-4bf3-8fad-e4d087312c72).html" class="link person"><span>Gani, R.</span></a> &amp; Hukkerikar, A. S. <span class="date">2017</span> <span class="journal">In : <a rel="Journal" href="http://orbit.dtu.dk/en/journals/chemical-engineering-science(41b6b42c-c88d-430a-9461-5ec3aa5943f2).html" class="link"><span>Chemical Engineering Science.</span></a></span> <span class="numberofpages">44 p.</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research - peer-review<span class="type_parent_sep"> › </span></span><span class="type_classification">Journal article – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_contributiontojournal rendering_detailsportal rendering_contributiontojournal_detailsportal"><div class="abstract"><div class="textblock">In this paper, we present group-contribution (GC) based property models for estimation of physical properties of amino acids using their molecular structural information. The physical properties modelled in this work are normal melting point (T<sub>m</sub>), aqueous solubility (W<sub>s</sub>), and octanol/water partition coefficient (K<sub>ow</sub>) of amino acids. The developed GC-models are based on the published GC-method by Marrero and Gani (J. Marrero, R. Gani, Fluid Phase Equilib. 2001, 183-184, 183-208) with inclusion of new structural parameters (groups and molecular weight of compounds). The main objective of introducing these new structural parameters in the GC-model is to provide additional structural information for amino acids having large and complex structures and thereby improve predictions of physical properties of amino acids. The group-contribution values were calculated by regression analysis using a data-set of 239 values for T<sub>m</sub>, 211 values for W<sub>s</sub>, and 335 values for K<sub>ow</sub>. Compared to other currently used GC-models, the developed models make significant improvements in accuracy with average absolute error of 10.8 K for Tm and logarithm-unit average absolute errors of 0.16 for K<sub>ow</sub> and 0.19 for W<sub>s</sub>.</div></div><div class="article"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr><tr><th>Journal</th><td><a rel="Journal" href="http://orbit.dtu.dk/en/journals/chemical-engineering-science(41b6b42c-c88d-430a-9461-5ec3aa5943f2).html" class="link"><span>Chemical Engineering Science</span></a></td></tr><tr><th>Number of pages</th><td>44</td></tr><tr><th>ISSN</th><td>0009-2509</td></tr><tr class="digital_object_identifiers"><th>DOIs</th><td><ul class="relations digital_object_identifiers"><li><a onclick="window.open(this.href); return false;" href="http://dx.doi.org/10.1016/j.ces.2017.09.019" class="link"><span>http://dx.doi.org/10.1016/j.ces.2017.09.019</span></a> </li></ul></td></tr><tr class="status"><th>State</th><td><span class="prefix">Accepted/In press - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/estimation-of-physical-properties-of-amino-acids-by-groupcontribution-method(670336a2-3a6e-47ba-b65c-663b31f7f83e).html2017-01-01T00:00:00ZProperty Uncertainty Analysis and Methods for Optimal Working Fluids of Thermodynamic Cycleshttp://orbit.dtu.dk/en/publications/property-uncertainty-analysis-and-methods-for-optimal-working-fluids-of-thermodynamic-cycles(60daa3b9-403a-4202-b864-f836af8e19de).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_bookanthology rendering_short rendering_bookanthology_short"><h2 class="title"><a rel="BookAnthology" href="http://orbit.dtu.dk/en/publications/property-uncertainty-analysis-and-methods-for-optimal-working-fluids-of-thermodynamic-cycles(60daa3b9-403a-4202-b864-f836af8e19de).html" class="link"><span>Property Uncertainty Analysis and Methods for Optimal Working Fluids of Thermodynamic Cycles</span></a></h2><a rel="Person" href="http://orbit.dtu.dk/en/persons/jerome-frutiger(f46a6846-c384-4042-ab10-b5cb3a79534b).html" class="link person"><span>Frutiger, J.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/gurkan-sin(4c35984e-28c5-43c9-9a4b-c7ac589bf597).html" class="link person"><span>Sin, G.</span></a> &amp; <a rel="Person" href="http://orbit.dtu.dk/en/persons/jens-abildskov(ca10c269-2d51-4ab5-830a-637fbbcd3ec9).html" class="link person"><span>Abildskov, J.</span></a> <span class="date">2017</span> Kgs. Lyngby: <a rel="Publisher" href="http://orbit.dtu.dk/en/publishers/technical-university-of-denmark-dtu(f7c040ab-194a-4da4-b458-670da24b2a08).html" class="link"><span>Technical University of Denmark (DTU)</span></a>. <span class="numberofpages">275 p.</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research<span class="type_parent_sep"> › </span></span><span class="type_classification">Ph.D. thesis – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_bookanthology rendering_detailsportal rendering_bookanthology_detailsportal"><div class="abstract"><div class="textblock">There is an increasing interest in recovering industrial waste heat at low tempera-tures (70-250◦C). Thermodynamic cycles, such as heat pumps or organic Rankine cycles, can recover this heat and transfer it to other process streams or convert it into electricity. The working fluid, circulating around the cycle, is vital for the per-formance of the cycle. Computational modelling of working fluid properties and cycle processes allows to identify promising working fluid candidates together with optimal cycle conditions.<br />However, such computer simulations are subject to modelling uncertainties due to the operational conditions, process correlations and fluid properties. In this thesis the focus lies on the uncertainties from physical and chemical property data, caused by the experimental measurements or by the prediction models.<br />This thesis project presents a comprehensive framework to assess property un-certainties for different levels of thermodynamic cycle models. The framework con-sists of 1) a methodology for the development and uncertainty analysis of group contribution based property models, 2) a Bootstrap method for the quantification of uncertainties associated to equations of state parameters, 3) a Monte Carlo pro-cedure for the propagation of property uncertainties through the cycle process onto the model output uncertainty, and 4) novel strategies for the selection of working fluids under property uncertainties, in particular a new reverse engineering ap-proach based on sampling and uncertainty concepts. The framework is applied to different applications and case studies from industrial project partners.<br />Novel group contribution based property models are developed for the estima-tion of flammability-related properties (e.g. the lower flammability limit) of work-ing fluids. Compared to existing models, the ones presented here show a higher accuracy, are simpler to apply and provide every prediction value with its corre-sponding uncertainty range (with 95% confidence). The study also reveals that group contribution methods can suffer from parameter identifiability issues charac-terized by a significant correlation between estimated parameters. Hence, in order to ensure reliable estimation, reporting the 95% confidence interval of the model predictions is important.<br />In a second application it is shown how the uncertainty propagation of two types of equations of states, cubic and PC-SAFT, can be compared in the context of an industrial organic Rankine cycle, used for the recovery of waste heat from an engine of a marine container ship. The study illustrates that the model structure is vital for the uncertainties of equations of state and suggests that uncertainty becomes a criterion (along with e.g. goodness-of-fit or ease of use) for the selection of an equation of state for a specific application.<br />Furthermore, two studies on the identification of suitable working fluids for thermodynamic cycles are presented. The first one selects and assesses working fluid candidates for an organic Rankine cycle system to recover heat from a low-temperature heat source. The ranking of working fluids can be significantly differ-ent based whether the mean value or the uncertainties (e.g. the lower bound of the 95%-confidence interval) of the model output are considered. Hence, uncertainty analysis with respect to the input property uncertainties is a vital tool for model analysis and fluid selection.<br />In the second fluid selection study the novel reverse engineering approach based on sampling techniques and uncertainty analysis is applied to identify suitable working fluids for a industrial heat pump system, used to recover heat from spray-drying air in dairy industries. The novel reverse engineering approach provides a valid alternative to computationally demanding optimization approaches and al-lows to take into account property uncertainties.<br />The outcome of this thesis asserts that property uncertainties should be taken into account for process simulation applications, in order to support the model-based and reliable decisions on process fluids and process design.</div></div><div class="phddissertation"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr></tbody></table><table class="properties"><tbody><tr><th>Place of Publication</th><td>Kgs. Lyngby</td></tr><tr><th>Publisher</th><td><a rel="Publisher" href="http://orbit.dtu.dk/en/publishers/technical-university-of-denmark-dtu(f7c040ab-194a-4da4-b458-670da24b2a08).html" class="link"><span>Technical University of Denmark (DTU)</span></a></td></tr><tr><th>Number of pages</th><td>275</td></tr><tr class="status"><th>State</th><td><span class="prefix">Published - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/property-uncertainty-analysis-and-methods-for-optimal-working-fluids-of-thermodynamic-cycles(60daa3b9-403a-4202-b864-f836af8e19de).html2017-01-01T00:00:00ZDrag resistance measurements for newly applied antifouling coatings and welding seams on ship hull surfacehttp://orbit.dtu.dk/en/publications/drag-resistance-measurements-for-newly-applied-antifouling-coatings-and-welding-seams-on-ship-hull-surface(28df17ba-814a-456f-bf16-f4fe95c1b3be).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_contributiontoconference rendering_short rendering_contributiontoconference_short"><h2 class="title"><a rel="ContributionToConference" href="http://orbit.dtu.dk/en/publications/drag-resistance-measurements-for-newly-applied-antifouling-coatings-and-welding-seams-on-ship-hull-surface(28df17ba-814a-456f-bf16-f4fe95c1b3be).html" class="link"><span>Drag resistance measurements for newly applied antifouling coatings and welding seams on ship hull surface</span></a></h2><a rel="Person" href="http://orbit.dtu.dk/en/persons/xueting-wang(200b8800-54ee-4904-ae8b-f727af849760).html" class="link person"><span>Wang, X.</span></a>, Olsen, S. M., Andres, E., Olsen, K. N. &amp; <a rel="Person" href="http://orbit.dtu.dk/en/persons/soeren-kiil(080ff861-7fa8-4b37-a0a7-ee3a7cacb037).html" class="link person"><span>Kiil, S.</span></a> <span class="date">2017</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research - peer-review<span class="type_parent_sep"> › </span></span><span class="type_classification">Conference abstract for conference – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_contributiontoconference rendering_detailsportal rendering_contributiontoconference_detailsportal"><div class="abstract"><div class="textblock">Drag resistances of newly applied antifouling coatings and welding seams on ship hull surface have been investigated using a pilot-scale rotary setup. Both conventional biocide-based antifouling (AF) coatings and silicone-based fouling release (FR) coatings have been studied and compared in their newly applied conditions. The effects of water absorption of newly applied antifouling coatings on frictional resistance were measured. A flexible rotor with artificial welding seams on its periphery has been designed and constructed to estimate the influence of welding seams on drag resistance. Both the density of welding seams (number per 5 m ship side) and the height of welding seams had a significant effect on drag resistance.</div></div><div class="conferenceabstract"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr><tr><th>Publication date</th><td><span class="date">2017</span></td></tr><tr><th>Number of pages</th><td>7</td></tr><tr class="status"><th>State</th><td><span class="prefix">Published - </span><span class="date">2017</span></td></tr><tr class="event"><th>Event</th><td><span class="prefix">13th Coatings Science International Conference 2017 - Noordwijk, Netherlands</span></td></tr></tbody></table></div><h3 class="subheader">Conference</h3><table class="properties"><tbody><tr><th>Conference</th><td>13th Coatings Science International Conference 2017</td></tr><tr><th>Location</th><td>Hotels van Oranje</td></tr><tr><th>Country</th><td>Netherlands</td></tr><tr><th>City</th><td>Noordwijk</td></tr><tr class="period"><th>Period</th><td><span class="date">26/06/2017</span> → <span class="date">30/06/2017</span></td></tr></tbody></table></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/drag-resistance-measurements-for-newly-applied-antifouling-coatings-and-welding-seams-on-ship-hull-surface(28df17ba-814a-456f-bf16-f4fe95c1b3be).html2017-01-01T00:00:00ZCalibration of the comprehensive NDHA-N2O dynamics model for nitrifier-enriched biomass using targeted respirometric assayshttp://orbit.dtu.dk/en/publications/calibration-of-the-comprehensive-ndhan2o-dynamics-model-for-nitrifierenriched-biomass-using-targeted-respirometric-assays(527a730a-250e-4054-badc-29027f44029f).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_contributiontojournal rendering_short rendering_contributiontojournal_short"><h2 class="title"><a rel="ContributionToJournal" href="http://orbit.dtu.dk/en/publications/calibration-of-the-comprehensive-ndhan2o-dynamics-model-for-nitrifierenriched-biomass-using-targeted-respirometric-assays(527a730a-250e-4054-badc-29027f44029f).html" class="link"><span>Calibration of the comprehensive NDHA-N<sub>2</sub>O dynamics model for nitrifier-enriched biomass using targeted respirometric assays</span></a></h2><a rel="Person" href="http://orbit.dtu.dk/en/persons/carlos-domingofelez(dcf60871-47a5-47ee-b142-f3823055978d).html" class="link person"><span>Domingo-Felez, C.</span></a>, Calderó-Pascual, M., <a rel="Person" href="http://orbit.dtu.dk/en/persons/gurkan-sin(4c35984e-28c5-43c9-9a4b-c7ac589bf597).html" class="link person"><span>Sin, G.</span></a>, <a rel="Person" href="http://orbit.dtu.dk/en/persons/benedek-g-plosz(f89de989-38da-486a-a878-99afb4aaa604).html" class="link person"><span>Plósz, B. G.</span></a> &amp; <a rel="Person" href="http://orbit.dtu.dk/en/persons/barth-f-smets(915b38db-4460-4b17-b74c-e5cc7581d03f).html" class="link person"><span>Smets, B. F.</span></a> <span class="date">2017</span> <span class="journal">In : <a rel="Journal" href="http://orbit.dtu.dk/en/journals/water-research(2ab4fa47-d3d9-4d9d-ad29-a51220cf16a5).html" class="link"><span>Water Research.</span></a></span> <span class="volume">126</span>, <span class="pages">p. 29-39</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research - peer-review<span class="type_parent_sep"> › </span></span><span class="type_classification">Journal article – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_contributiontojournal rendering_detailsportal rendering_contributiontojournal_detailsportal"><div class="abstract"><div class="textblock">The NDHA model comprehensively describes nitrous oxide (N2O) producing pathways by both autotrophic ammonium oxidizing and heterotrophic bacteria. The model was calibrated via a set of targeted extant respirometric assays using enriched nitrifying biomass from a lab-scale reactor. Biomass response to ammonium, hydroxylamine, nitrite and N2O additions under aerobic and anaerobic conditions were tracked with continuous measurement of dissolved oxygen (DO) and N2O.
The sequential addition of substrate pulses allowed the isolation of oxygen-consuming processes. The parameters to be estimated were determined by the information content of the datasets using identifiability analysis. Dynamic DO profiles were used to calibrate five parameters corresponding to endogenous, nitrite oxidation and ammonium oxidation processes. The subsequent N2O calibration was not significantly affected by the uncertainty propagated from the DO calibration because of the high accuracy of the estimates. Five parameters describing the individual contribution of three biological N2O pathways were estimated accurately (variance/mean &lt; 10% for all estimated parameters).
The NDHA model response was evaluated with statistical metrics (F-test, autocorrelation function). The 95% confidence intervals of DO and N2O predictions based on the uncertainty obtained during calibration are studied for the first time. The measured data fall within the 95% confidence interval of the predictions, indicating a good model description. Overall, accurate parameter estimation and identifiability analysis of ammonium removal significantly decreases the uncertainty propagated to N2O production, which is expected to benefit N2O model discrimination studies and reliable full scale applications.
</div></div><div class="article"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr><tr><th>Journal</th><td><a rel="Journal" href="http://orbit.dtu.dk/en/journals/water-research(2ab4fa47-d3d9-4d9d-ad29-a51220cf16a5).html" class="link"><span>Water Research</span></a></td></tr><tr><th>Volume</th><td>126</td></tr><tr><th>Pages (from-to)</th><td>29-39</td></tr><tr><th>ISSN</th><td>0043-1354</td></tr><tr class="digital_object_identifiers"><th>DOIs</th><td><ul class="relations digital_object_identifiers"><li><a onclick="window.open(this.href); return false;" href="http://dx.doi.org/10.1016/j.watres.2017.09.013" class="link"><span>http://dx.doi.org/10.1016/j.watres.2017.09.013</span></a> </li></ul></td></tr><tr class="status"><th>State</th><td><span class="prefix">Published - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/calibration-of-the-comprehensive-ndhan2o-dynamics-model-for-nitrifierenriched-biomass-using-targeted-respirometric-assays(527a730a-250e-4054-badc-29027f44029f).html2017-01-01T00:00:00ZRole of Biocatalysis in Sustainable Chemistryhttp://orbit.dtu.dk/en/publications/role-of-biocatalysis-in-sustainable-chemistry(a68f67df-854e-4cb8-a86f-066faeda1ebd).html
<div style='font-size: 9px;'><div class="rendering rendering_publication rendering_publication_short rendering_contributiontojournal rendering_short rendering_contributiontojournal_short"><h2 class="title"><a rel="ContributionToJournal" href="http://orbit.dtu.dk/en/publications/role-of-biocatalysis-in-sustainable-chemistry(a68f67df-854e-4cb8-a86f-066faeda1ebd).html" class="link"><span>Role of Biocatalysis in Sustainable Chemistry</span></a></h2>Sheldon, R. A. &amp; <a rel="Person" href="http://orbit.dtu.dk/en/persons/john-woodley(dbb6f37d-325d-49d2-855d-aa887e9ecdd5).html" class="link person"><span>Woodley, J.</span></a> <span class="date">2017</span> <span class="journal">In : <a rel="Journal" href="http://orbit.dtu.dk/en/journals/chemical-reviews(313229f9-ab9a-43ac-b60d-99f93c43df90).html" class="link"><span>Chemical Reviews.</span></a></span> <span class="numberofpages">38 p.</span><p class="type"><span class="type_family">Publication<span class="type_family_sep">: </span></span><span class="type_classification_parent">Research - peer-review<span class="type_parent_sep"> › </span></span><span class="type_classification">Journal article – Annual report year: 2017</span></p></div><div class="rendering rendering_publication rendering_publication_detailsportal rendering_contributiontojournal rendering_detailsportal rendering_contributiontojournal_detailsportal"><div class="abstract"><div class="textblock">Based on the principles and metrics of green chemistry and sustainable development, biocatalysis is both a green and sustainable technology. This is largely a result of the spectacular advances in molecular biology and biotechnology achieved in the past two decades. Protein engineering has enabled the optimization of existing enzymes and the invention of entirely new biocatalytic reactions that were previously unknown in Nature. It is now eminently feasible to develop enzymatic transformations to fit predefined parameters, resulting in processes that are truly sustainable by design. This approach has successfully been applied, for example, in the industrial synthesis of active pharmaceutical ingredients. In addition to the use of protein engineering, other aspects of biocatalysis engineering, such as substrate, medium, and reactor engineering, can be utilized to improve the efficiency and cost-effectiveness and, hence, the sustainability of biocatalytic reactions. Furthermore, immobilization of an enzyme can improve its stability and enable its reuse multiple times, resulting in better performance and commercial viability. Consequently, biocatalysis is being widely applied in the production of pharmaceuticals and some commodity chemicals. Moreover, its broader application will be further stimulated in the future by the emerging biobased economy.</div></div><div class="article"><table class="properties"><tbody><tr class="language"><th>Original language</th><td>English</td></tr><tr><th>Journal</th><td><a rel="Journal" href="http://orbit.dtu.dk/en/journals/chemical-reviews(313229f9-ab9a-43ac-b60d-99f93c43df90).html" class="link"><span>Chemical Reviews</span></a></td></tr><tr><th>Number of pages</th><td>38</td></tr><tr><th>ISSN</th><td>0009-2665</td></tr><tr class="digital_object_identifiers"><th>DOIs</th><td><ul class="relations digital_object_identifiers"><li><a onclick="window.open(this.href); return false;" href="http://dx.doi.org/10.1021/acs.chemrev.7b00203" class="link"><span>http://dx.doi.org/10.1021/acs.chemrev.7b00203</span></a> </li></ul></td></tr><tr class="status"><th>State</th><td><span class="prefix">Accepted/In press - </span><span class="date">2017</span></td></tr></tbody></table></div></div></div>Sun, 01 Jan 2017 00:00:00 GMThttp://orbit.dtu.dk/en/publications/role-of-biocatalysis-in-sustainable-chemistry(a68f67df-854e-4cb8-a86f-066faeda1ebd).html2017-01-01T00:00:00Z